Here's another "sign" that Justin Timberlake and Jessica Biel really have broken up: Justin declared he would climb Mt. Kilimanjaro with her, and while she reached the summit today, he was last spotted beat boxing on stage in Wyoming. [Hollyscoop]

Jessica Biel, Emile Hirsch and company posed for a picture when they reached the summit this morning. They're doing the climb to draw attention to the global water crisis. [People]

As mentioned earlier, Conan O'Brien announced today that he won't host The Tonight Show at 12:05 a.m. "I cannot express in words how much I enjoy hosting this program," said Conan, "But I cannot participate in what I honestly believe is its destruction." [NYT]

During his monologue last night, Jay Leno said, "I leave NBC prime time the same way as I found it: A complete disaster." Isn't NBC giving Jay what he wants? [Radar]

The latest rumor about Tiger Woods whereabouts is that he's checked himself into sex rehab in Arizona. [People]

Sources say Elin Nordegren has been living in a $2 million mansion near the mansion she shared with Tiger Woods since mid-December. [TMZ]

John Mayer swore off Twitter for a week saying, "I will read books. I will listen to music. I will better track the words of others as they're spoken to me. I will not use texting as a form of reaching out for superficial attention/affection at all hours of the night." Now he's back with this Tweet: "You really get to know your pants when you travel." [E!]

Jennifer Aniston was photographed driving while talking on her cell phone, which is illegal in California. Who bets the tabloids say she was talking to Brad? [Radar]

Casey Johnson was buried this morning at her family's plot in New Brunswick, New Jersey. [TMZ]

Since we haven't heard much about how Tila Tequila feels about Casey Johnson recently, editors at People decided to interview her yesterday. Tila says of their month-long romance, "Lesbians tend to move very fast. They call us U-haul lesbians and that's what we did. She U-hauled herself into my house the next day [after their first date]." Tila says that she also wanted to adopt Johnson's 3-year-old daughter. "I was going to adopt Ava and we decided she would call her Mommy and me Mommy T. We were going to have a big family. She wanted seven children, but she said she wanted me to be the pregnant one." [People]

The National Enquirer claims that Rosie O'Donnell's new girlfriend Tracy Kachtick-Anders has already moved into her Florida home. [Perez]

The paparazzi helped Lindsay Lohan out for once. Law enforcement sources say footage shot by the paps proves her driver isn't guilty of "assault with a deadly weapon" for allegedly hitting a photographer. He could be charged for a hit-and-run, but no one was seriously injured. [TMZ]

Roman Polanski is suing four French publications for publishing photos of him and his family. The photos show Polanski in his home under house arrest, his wife walking down the street in Switzerland, and his children at the airport with their faces blurred. His lawyer says, "The legal case against Polanski in no way justifies the paparazzi's stalking of his wife and children." [AP]

A tabloid claimed recently that Jason Trawick has been cheating on Britney Spears with several women. Now Milana Rabkin, one of the women spotted with Trawick, has spoken up to explain that they are actually just business associates and the alleged rendez-vous was a birthday party for another colleague. [Us]

Simon Cowell said of the rumors that he asked Paula Abdul to be a judge on The X Factor, "Paula has been talking to me for months. I've always made it clear that in some capacity I want to work with Paula again. It might be here, it might be in England. I adore Paula. I miss her." [Extra]

Lawyers were still haggling over the terms of Simon Cowell's move from American Idol to The X Factor as he was driving to the press conference to make his announcement yesterday. [TMZ]

Do "Paula-holics" really need a "Guide to Watchign (Abdul-Free) American Idol?" [People]

BREAKING: Nadya Suleman was kicked out of her gym for falling behind on membership fees. [TMZ]

A source claims Jude Law is about to propose to Sienna Miller. "Sienna was always the one. And now she is back in his life he never wants to let her go again," said the source. "Jude did some serious thinking over Christmas in Britain with his ex-wife Sadie and the kids. And he realises just how important family life is to him. He needs a good woman to look after him. Sienna's fed up of the single life and wants to be with Jude for good." [Contact Music]

Richard Heene had a "smooth" and "peaceful" first night in jail, according to correction officers. He's staying in a 12 foot by 5 foot cell with another inmate. [Radar]

Heidi Montag says she titled her new album Superficial because, "That's the world I live in and how people think I am but it's really just the surface. People are just getting to know a whole new Heidi. I put my heart into this music and it'll really show." Here's a sample lyric: "Come eat m panties off of me / Do whatever you feel comes naturally." [People]

Valerie Bertinelli, Jane Leeves, Wendie Malick and Betty White will star in the pilot for Hot In Cleveland, about "three eccentric fortysomething best friends from L.A. who wind up stuck in Cleveland and decide to stay there when they realize the locals consider them glamorous." It sounds suspiciously similar to the screenplay Liz Lemon keeps squirreled away in her desk. [Hollywood Reporter]

Cybil Shepherd's 22-year-old son Cyrus was arrested in Philadelphia last night for allegedly stealing from fellow passengers on a cross-country flight. [AP]

Aisha Tyler says of Sarah Palin being hired as a Fox News commentator: "My only question is, I feel like to be qualified as a pundit, you actually have to have a basic mastery of the English language, so I don't think she's qualified for the job." [ET]

Bertrand Cantat of the French band Noir Desir was convicted of beating his girlfriend to death and released on parole in 2007. Now police are questioning him in the death of the mother of his two children. It appears that his ex-wife hanged herself on Sunday while Cantat was asleep in her home. [ONTD]

Lost executive producer Carlton Cuse says, "We are definitely ending this show in May. There will be no implanted sequel or backdoor pilot embedded in that ending." [The Wrap]

Lisa Marie Presley's former nanny has dropped the lawsuit against her. Lisa Marie says the suit was bogus and filed "out of utter greed and revenge because we terminated her ..." [TMZ]

People is presenting Elisabetta Canalis saying "Yes, I love it," when asked if she enjoys spending awards season with George Clooney as news. [People]

ABC ordered second seasons of Modern Family, Cougar Town, and The Middle. [Variety]

NYU Law students tried to pool their money to bring Snooki to a party, but her rates skyrocketed recently and she's now out of their price range. [Above The Law]

In an interview about the First Family's TV habits, Michelle Obama reveals that she's never seen Jersey Shore and the girls are only allowed to watch children's TV networks. "Unless they want to watch football with me, which they're always welcome. But somehow they haven't been drawn to that yet," adds the President. [People]

The paparazzo who accused Debbie Rowe of assault lost his case today and she was cleared of all charges. [ET]

Attention Trekkies: the Star Trek sequel will be released on June 29, 2012. [MTV]

When asked if she would ever do a love scene with Robert Pattinson, his Twilight co-star Ashley Greene said, "I think out of anyone the connection that Alice and Edward have because of their extra abilities that would be weird." [Radar]

Perez Hilton posted his audition video for the role of Amos in Chicago in which he sings "Mr. Cellophane". He didn't get the part. [Perez]

Gross: Hugh Jackman's wife and 9-year-old son looked on as he made out with a actress for a Lipton Iced Tea commercial. [Radar]

ABC is creating a Bachelor spin-off show called Bachelor Pad, in which former contestants will live together and compete with one each other. [People]

Picabo Street says she decided to promote the permanent birth control procedure Essure because, "I was shocked to learn how few women, myself included, don't know about all options when it comes to our health. It just seems crazy to me that the information is not more readily accessible and current, like the information posters on the back of the door in doctor's offices. Why did I have to find the information myself? I don't want everyone to have to work so hard." [People]

Carrie Underwood said in a radio interview, "Once I got out of high school I packed on about 10 pounds, and once I was on American Idol I packed on another 10 pounds. I'm a little person, I'm 5-3, and I was about 130." She then announced that her belly is her problem area. "I carry all my stress weight, all my potato chip weight around my mid section. You've got to fight genetics sometimes." [Us]

Lynne and Frank Curtin of Real Housewives of Orange County are being evicted from their home. [Radar]

LuAnn de Lesseps of The Real Housewives of New York City has written and recorded a dance song called "Money Can't Buy Class." [E!]

"When I wake up, I look like the woman in Monster," — Charlize Theron [Radar]

Vanessa Paradis says of having children with Johnny Depp, "I'd wanted to be a mother for a long time, but with him I couldn't avoid it... He was, and still is, the love of my life." [Us]

Diablo Cody says the marketing for Jennifer's Body "was a little messed up. It was marketed mostly to boys and I think we could have had a large female audience that was ignored... I want to believe deep down inside that movie will find its audience. At the same time, many of us knew that it wasn't going to connect which is a terrible thing to say. As much as I love that movie, and I'm incredibly proud of that movie and I will love it forever, I feel it's very unusual and I don't think it's super accessible in a lot of ways. I don't think it was a typical, mass appeal popcorn horror movie. I think it was more like an art film. I know some people would laugh at that." [Contact Music]

If you were looking forward to reading Dame Helen Mirren's upcoming book about sex, sorry, but the rumors aren't true. "Sometimes you make an offhand comment to someone somewhere and it gets handed down," says Mirren. "But I would someday like to do a book. A whole different kind. A novel. I love the process. It came so easily to me when I sat down to write something, and took me by surprise because I didn't know I'd enjoy it so much. But writing about love and sex? Not until I'm dead." [Daily Express]

Slash says he was offered, "Seven, eight digit kinds of things," to reunite with Guns N' Roses, but he's not interested. "I am a pretty realistic kind of person, and don't expend energy worrying, 'What if?'. If I hear great music we did together, I respect it for what it was and appreciate it. But I'm not like everyone else around the band who wants to somehow try to recreate it because there's so much money to be made." [The Mirror]

Channing Tatum severely burned his penis while shooting a film in the freezing Scottish Highlands. "The only way to keep warm was by pouring a mix of boiling water and river water down your suit," said Tatum. "[A crewman had] forgotten to dilute the kettle water, so he poured scalding water down my suit. And I was trying to pull the suit away from my body to somehow get away from the boiling water, and the more I pulled the suit away, the lower the water went. It just went straight down and pretty much burned the skin off the head of my dick." He was rushed to the hospital and, "Now my penis is fantastic! One hundred percent recovered. Put me back in the game, Coach." [Us]

David Duchovny says he moved back to New York from Malibu because he was afraid of, "Sun damage. The car culture, driving them everywhere. And then, in a way, the image of women that you get when you grow up in Malibu-everybody's in bathing suits and has belly rings. I wanted my daughter to see a woman who didn't have a belly ring. And on the Upper East Side you don't see too many of them. If you did, it would be pretty gross." [Details]

In The Back Up PlanJennifer Lopez plays a woman who does IVF, but she says she never considered it herself "Because... when it comes to family and relationships, I'm quite traditional. Just because of the way I was raised... I also believe in God and I have a lot of faith in that, so I just felt like you don't mess with things like that. And I guess deep down I really felt like either this is not going to happen for me or it is." [Daily Mail]